†class Hydroconozoa Korde 1963
Parent taxon: Cnidaria according to C. T. Scrutton 1997
See also Sepkoski 2002
Sister taxa: Anthozoa, Cambroctoconus, Cambrorhytium, Crassitubus, Erniettamorpha, Escumasia, Haootia, Kimberia, Liaoningia, Medusae, Medusozoa, Melanofurcata, Melanosteus, Melanostylus, Myxozoa, Priscapennamarina, Pywackia, Quadratitubus, Ramellina, Ramitubus, Sinocyclocyclicus, Spatangopsis, Syringophyllum, Thaumoptilon, Vauzutsubua, Xianguangia, Zolotytsia
Subtaxa: Alatoconus Aploconus Asteroconus Dasyconus Gastroconus Hydroconus Radioconus Tuvaeconus Vologdinella
Distribution: